William pohlmaist



(No Model.) I'

W. POHLMAN.

ADJUSTABLE PACKING FOR" PIsTo'N RODS.

No. 347,197. Patented Aug. 10, 1886.

yin-ml lllllllllll UNITED STATES vPATENT OFFICE.

VILLIAM POHLMAN, OF MKIDVDLETOYVN, NEV YORK.

ADJUSTABLE PAQKING FOR PlSTON-RODS.4

` "EECIFIGATION forming part of Letters Patent No. 347,197,1dated August 10, 1886.

(No model.)

l ters of reference marked thereon.

The object of the invention is tomake a perfectly steam or water tight joint without k the use of hemp, soaps-tone, or other similar packing.

In the accompanying drawings, Figure l is a longitudinal section of the forward end of a cylinder, showing the stuiiing-box, gland, rod, and packing. Figs. 2 and 3 show details of the invention as hereinafter described.

Similar letters of reference indicate similar parts inthe respective ligures.'

A is the cylindenhead, having an ordinary stu'ling-box, a.

B is the piston-rod.

C is a gland or casing, having a front ilange, b, corresponding i n shape with the front iiange c ofthe stufiing-box, and is connected to said ange c by bolts in the usual manner. The interior ofthe casing Gis trued out upon the two faces c' c.

D is a ring surrounding the piston-rod, its forward end engaging the face c of the casing C. rI`l1e inner end of the ring D is beveled off, as shown at c, and against said beveled face a second beveled ring, E, having a correspondingly beveled face, tits. The outer beveled ring, D, is made in sections and provided with dowels or projections d, as shown at Fig. 2, so

that the sections of the ring F cannot slip opposite the joints of the ring D, and thus cause leakage. The fiat faces of the rings D and F fit against the trued face c of the casing C and make a steam-tight joint. The sectional ring F is square in cross-section, as shown in Fig. l, and fits within a rightangled recess at the outer or forward end of the sectional vring D.

Sufficient space is left between the annular packing-rings and the casing O to allow for a slight lateral motion of the piston-rod inside of the easing to permit steam to get on the outside of the packing to close it upon the rod.

G is a spring within the Stuffingbox a, and surrounding the piston-rod, for the purpose of forcing the rings D, E, and F against the face c of the casing C. A packing, c, is placed between the stuffingbox a and casing C.

. Having described my invention, I claiml. The combination of the cylinderhead A, casing C, spring G, solid ring E, and sectional rings D F, the ring D having the dowels d, all arranged substantially as set forth.

2. The combination ofthe cylinder-head A, casing C, packing e, spring G, solid ring E, and sectional rings D F, the ring D having the dowcls d, all arranged substantially as set forth.

VILLIAM POHLMAN.

fitnesses:

WILLIAM FUNNELL, HENRY W. WIGGINs. 

